单轴拉伸和压缩镁合金各滑移系的Schmid因子计算

针对单轴拉伸和压缩条件下的镁合金,计算了不同滑移系（基面滑移、柱面滑移、锥面滑移、锥面滑移）在整个取向空间中的Schmid因子分布.计算结果表明,基面滑移、柱面滑移和锥面滑移系的Schmid因子在取向空间中都有0.5的极大值;而锥面滑移系的Schmid因子普遍较低,当θ在80°左右,ψ在70°左右时的最大值仅为0.383.计算结果为镁合金变形机制的分析提供基础.

Calculation of Schmid factors for slip systems in magnesium alloy under uniaxial tension and compression

Aimed at magnesium alloys under uniaxial tension and compression conditions, the Schmid factor distribution of different slip systems （ the basal slip, the prismatic slip, pyramidal 〈 a 〉 and 〈 c ＋ a 〉 slips） in the whole orientation space is calculated. Results show that in the deformation process of magnesium al- loys, the schmid factors for the basal slip, the prismatic slip and pyramidal 〈 c ＋ a 〉 slip all have a maximum value of 0.5 in the whole orientation space; while the Schmid factor for pyramidal 〈 a 〉 slip is generally low ,reaching the maximum value of only 0. 383 when 0 is approximately 80° and ψ is 70°. The calcula- tion provides a basis for analyzing the deformation mechanisms of magnesium alloys.